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Old 07-13-2007, 11:23 PM   #1
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Default 3inch exhaust too loud?

For those running 3inch cat-backs, do you have audio/video clips? A local exhaust shop gave me a $275 out-the-door quote for a 3inch system, but I'm a little worried about loudness.

I know "loudness" is subjective so put it this way, anything louder then the RoadsterSport exhaust is a little too loud for me.

Thanks.
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Old 07-13-2007, 11:34 PM   #2
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with any exhaust, it will depend fully upon the muffler and resonators you use to quiet it.
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Old 07-14-2007, 12:45 AM   #3
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TELL YOU WHAT.

BrainyScott promised to bring recording stuff to my dyno tuning session tomorrow. We'll record my 3" turbo back for you so you can see what a real free flowing +cat exhaust sounds like.

Frankly... I LOVE it. Not loud at all if it's done right.

Matt
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Old 07-14-2007, 02:55 AM   #4
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Quote:
Originally Posted by y8s View Post
TELL YOU WHAT.

BrainyScott promised to bring recording stuff to my dyno tuning session tomorrow. We'll record my 3" turbo back for you so you can see what a real free flowing +cat exhaust sounds like.

Frankly... I LOVE it. Not loud at all if it's done right.

Matt
Thank you, I wanted to hear also cause I plan to run a 3" exhaust also.
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Old 07-14-2007, 01:24 PM   #5
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I have a Hi-Flow cat with 3" exhaust all the way back, no muffling of any sort. It is pretty loud, but it sounds good. I wouldn't trade it for anything smaller. If I can get my video camera to work I'll try to get a sound clip for yall.
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Old 07-14-2007, 02:22 PM   #6
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I ran a Magnaflow cat, 2 foot long resonater and muffler on my old system. Barely louder than stock. The quietest Miata with aftermarket exhaust I had ever heard. I loved it. 3" of course.

Also, $275 will not get you a decent exhaust. I would imagine thats a crush bent mild steel with a single Flowmaster or something like that. Run away from that shop and find one that will cut up mandrel bends (stainless preferably) and do the system right.
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Old 07-14-2007, 05:50 PM   #7
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back from the dyno. soon as braineack gets his **** together (ie stops playing with his new kitten) he'll probably upload the noize.
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Old 07-14-2007, 05:57 PM   #8
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My van is quieter with a 3" and straight through muffler then it was with a 2.5" and baffled muffler. The 2.5" did come out more in the middle though while the 3" goes out the back.
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Old 07-14-2007, 06:39 PM   #9
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That is why the 2.5" is louder.



Quote:
Originally Posted by Canker View Post
My van is quieter with a 3" and straight through muffler then it was with a 2.5" and baffled muffler. The 2.5" did come out more in the middle though while the 3" goes out the back.
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Old 07-14-2007, 06:56 PM   #10
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Quote:
Originally Posted by y8s View Post
back from the dyno. soon as braineack gets his **** together (ie stops playing with his new kitten) he'll probably upload the noize.
braineack... we want our sound ....lol
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Old 07-14-2007, 09:32 PM   #11
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Exhondaman,you live in California.Just drive down to Thermal R&d,Magnaflow or Borla and have them make you a nice custom mandrel bent exhaust.
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Old 07-14-2007, 09:34 PM   #12
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Quote:
Originally Posted by y8s View Post
back from the dyno. soon as braineack gets his **** together (ie stops playing with his new kitten) he'll probably upload the noize.
Never rush a man when he's playing with fresh *****.
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Old 07-14-2007, 10:37 PM   #13
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Quote:
Originally Posted by wildfire0310 View Post
braineack... we want our sound ....lol

it sounds great...exactly what I'd want, not loud at all.

https://www.miataturbo.net/braineack...ompilation.wmv
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Old 07-14-2007, 10:59 PM   #14
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ill try and get some sound files of mine i just did. i went with a 3" welded straight onto the turbo tony pipe. right after the flex piece. so an aspec l spec muffler.

about as loud as my fm single tip with the silencer in.
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Old 07-14-2007, 11:28 PM   #15
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Quote:
Originally Posted by Braineack View Post
it sounds great...exactly what I'd want, not loud at all.

https://www.miataturbo.net/braineack...ompilation.wmv
It sounds great.... forgot to turn down my computer speakers form watching a movie and I think I just made my neighbors **** themselves...lol


edit:

new question, looking through your photos, is seem as if you DP is 3" also and you have 1 cat and 1 resonator and 1 muffler correct??

sweet now i know that 3" won't kill my ears

Last edited by wildfire0310; 07-14-2007 at 11:36 PM. Reason: changing question
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Old 07-14-2007, 11:34 PM   #16
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dang,that exhaust is a lot quieter than mine. I'm running tony dp, no cat, and just small resonator. i think it sounds bad ***.... Scott chime in, you drove it!
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Old 07-17-2007, 11:35 AM   #17
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I was debating about getting a 3" exhuast, but not anymore! What kind of muffler is it?
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Old 07-17-2007, 12:22 PM   #18
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i drove in it....its not loud at all...tone is perfect...

big *** magnaflow muffler and a resonator.
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Old 07-17-2007, 12:40 PM   #19
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Here's the whole system description:

2-1/4 turbine outlet expanding to 3"
3" cat in stock location, soon to upgrade to metal cat
3" dynomax 12" bullet race muffler (perf, not louvered) in resonator location
3" magnaflow 22" perf core muffler. It's almost too long and I'd use this one if I did it again.
3.5" Gibson stainless steel tip, cut shorter so it doesn't cut up your shins.

Matt
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Old 07-17-2007, 01:37 PM   #20
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it is no louder than my car wich is good. i might just push for a bigger exhaust now.
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